All the Fancy Measuring Devices Used in Science Rely on Two Stone-Age Techniques

Well, science and baseball. Physicists build models to explain how the world works. It might be an equation, like the ideal ...
PBS

Estimate and Measure with Centimeters

Create your own centimeter ruler. Then, estimate and measure with lengths with it. Warm up with a Mystery Math Mistake as you add two 2-digit numbers using a decomposition strategy. Think through ...
BBC

Estimating and measuring

NARRATOR: I’ve got an idea, you can estimate the length in steps. The go-kart is ten steps in length and the limousine is 30 steps in length. 30 is three times ten. That makes the limousine three ...
BBC

Estimating to decide which units to use

To find a suitable unit to measure something in, you should first estimate how big it is. So, for example, do you think it's better to measure the distance between Aberdeen and Dumfries in metres or ...